Improvement in metallurgic gas-generators



2 Sheets-Sheet 1.

M. J. HAMILTON. Metalluygio Gas-Generator Patented Wot/2k amw N-FETERS.PHOTO-LITNOGRAPH UNI E STATES PATENT OFFICE.

MARK J HAMILTON, OF WHITEMARSH, PENNSYLVANIA.

IMPROVEMENT I N-METALLURGIC GAS-GENERATORS.

Specification forming part of Letters Patent No. 203,446, dated May 7, 1878 application filed January 26, 1878.

To all whom it may concern:

Be it known that I, MARK J OHN HAMILTON,

formerly of St. Louis, Missouri, but now of 'Whitemarsh, Montgomerycounty, Pennsyl- 1 objects of my improvements being to protect thevalves of the generator from the destructive effects of the heat towhich they are subjected.

In the accompanying drawings, Figure 1, Sheet 1, is a verticalsection ofthe gas-generator with my improvements Fig. .2, Sheet 2, a verticalsection of the generator on the line 1 2, Fig. 1 Figs. 3, 4, and 5,detached views of parts appertaining to the generator.

In Sheets 1 and 2, A is the generator, consisting of a vessel formedsubstantially as shown in the drawing, and having an exterior casing ofwrought-iron plates and lined with fire-brick, N being the ash-pit.

On the top of the vessel is a feeding device, the main features of whichare fully described in my aforesaid patent. The valve E is,containedwithin a valvebox, E, and this has a double 1 top, bottom, sides, andends, forming spaces, through which water can circulate free1y,-in orderto protect the surfaces of the valveand its seat from the injuriouseffects of ,heat imparted by the ignited fuel in the generator.

Water may be supplied to these spaces from an elevated reservoir, andmay be discharged from the said spaces through suitable pipes, so thatthe valve-box may always be in a comparatively cool condition.

The valve E is hollow, as is also the valverod a, which passes through astuffing-box, and is connected to any suitable device for operating thevalve.

A cold-water pipe, (1', extends through the tubular valve-rod a. towithin a few inches of the end of the valve, and an elastic pipe, d,connects with the pipe at through the side of the hollow valve-rod, andconveys cold water to the valve E. The water, after cooling this valve,passes through the spaces between the external surface of thepipe a andthe internal surface of the hollow valve-rod, and is discharged througha suitable elastic tube, 1).

The interior of the generator, instead of communicating with thepurifier through a single pipe, as in my formerpatent, communicatesthrough a number of openings, j, With an annular pipe, D, supported bybrackets on the exterior casing, and this annular pipe communicatesthrough a pipe, H, with the purifier when the cock H isopen.

D is the annular blast-pipe, similar to that described in my saidpatent, and communicates with the interior of the generator throughtuyeres j, the blast being communicated through .a pipe, D furnishedwith a suitable cock, D 2, w I

A pipe, k, furnished with a cock, k forms a communication between theblast-pipe D and the ashpit when the said cock is open, and k is a pipeleading from the ash-pit to the open air, and having a cock, k

A cast-iron chambered ring, 19 situated at the discharge-opening at thebottom of the generating-chamber, has two cold-water supply-pipes, h h,and two, hot-water dischargepipes, h hf, as shown, in order that thesaid ring may be maintained in a comparatively cool condition by thecirculation of water through it. This ring is supported by the girders i2 which rest on the brick lining of the ash-pit; and, if desired, thesegirders may be made hollow, and have a stream of cold waterpassedthrough, them. The hollow grate- .bars 9 are also supported by thesegirders,

and are supplied with streams of cold water through the pipe t V is avalve fitted to the ring 10 and, with the exception that it is slightlywed ge-shaped, is similar in .every respect to the valve E hereinbefore'described, having a cold-water tube, 0, supplied through the elastictube t and a warm-water space, 12 connected with a suitable elasticdischarge-tube, t.

The hollow valve-rod h has a screw-thread cut on its external surface,and adapted to the threaded interior of the hub of the wheel 0, which istight against the bracket-plate m and is kept firmly in its place by theclampingbars m as shown in Fig. 5.

By revolving the wheel 0 thevalve-rod h will be moved horizontally inthe required direction and the valve V shut or opened, as desired.

This valve is always open, except when it is found necessary to cleanout the ash-pit. As pieces of incoinbustible material may be too largeto fall through the grate-bars, a poker, 10, is employed to remove them.This poker passes horizontally through a hollow vertical stopper, T,which is made slightly conical, and is arranged to turn on its verticalaxis in the outer portion of the case 1", the latter be ing riveted tothe casing of the generator, and its inner portion passing through thewall of the ash-pit. The entrance to the'outer portion of the case forthe admission of the poker is elongated horizontally, as'shown by dottedlines in Fig. 3, and the inner portion of the case, which passes throughthe wall, is made flaring, so that the poker can be vibrated laterally,the stopper oscillating in its bearings as the poker is vibrated.

- The poker, where it ,passes through the stopper, is surrounded by apacking of ashestus, which is confined within the cylindrical opening ofthe stopper by two followers, W.

The incombustible material which falls through the grate-barsis'remov'ed from the ash-pit N.

The operation of my improvement is as follows: After the lining in thegenerator has been dried, the cooks k and D are closed; but the valves Eand V remain open, as well as the doorin of the ash-pit. The lower partof the generator A is filled up to about the level of the tuyeres j withsmall pieces of thoroughly-dried wood through the aperture in 'thefeeding-cylinder. Coke or charcoal is then charged onto the Wood throughthe same aperture until the generator is filled, after which the fire islighted at the grate-bars g and fed by an air-draft through the openinga. As soon as the fuel has been properly ignited, the grate-bars andash-pit are cleaned out and the aperture a closed. The valve E is nowclosed, as are also the cocks H and k so as to make the generatorgas-tight. The cock D is then partially opened, and a gentle air-blastallowed to enter the fire through the pipe D and the tuyeresoj until thegases in the generator. have attained their maximum pressure, afterwhich the cock D is fully opened.

After the gases in the generator have attained their maximum pressure,fuel is fed to it in the manner described in the aforesaid patent, thesaid fuel being either coke, coal, charcoal, or thoroughly-dried wood.

When it is necessary to remove the ashes from the ash-pit N, thewedge-shaped slidevalve V is pushed forward by turning the wheel 0 untilit is tightly pressed against the ring 10 by being jammed between it andthe grate-bars 9 The cook 10 is now opened, and the gases in the ash-pitallowed to flow into the open air until the pressure inside and out isthe same, or nearly so. The cock k is then opened, and the remainder ofthe gas removed by the atmospheric air flowing through the pipe k, andthence through the pipe 10 Care must be taken to remove all the gasesfrom the ash-pit N before opening the door a, so as to avoid theexplosion that might take place if any ignited matter chanced to be inthe ash-pit with the gases at the time of opening the door 12 As soon asall the gases are thus removed, the cock k is closed, the door itopened, and the ash-pit cleaned out, after which the cook 70 is closedand the door replaced, as before.

If the tuyeres enter below instead of above the grate-bars g the pipe iswill be dispensed with and the door it removed as soon as the valve V isclosed and the pressure lowered to that of the atmosphere by opening thecock Ye I claim as my invention- 1. The combination of the generator andthe grate at the bottom of the same with a water-cooler valve betweenthe generator and grate, all substantially as set forth.

2. The combination of the hollow wedgeshaped valve V with the ring 19and the grate.

3. The combination of the valve V and its hollow spindle, threadedexternally, with the wheel 0," having an internally-threaded hub adaptedto the said spindle, the bracket-plate m and clamping-bars m forconfining the said hub to the bracket, all substantially as set forth.

4. The combination of the ash-pit N and grate g with the case r, securedto the casing of the generator, the poker p and the packed verticalstopper 1", through which the poker passes, and which permits thelateral vibration of the said poker, all as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

M. J. HAMILTON.

Witnesses:

JOHN M. DEEMER, HARRY SMITH.

